Blowing-engine



No. 620,983. Patented Mar. l4, I899.

E. E. SLICK.

BLOWING ENGINE.

(Application filed June 1, 1898.1 (No Model.) 3 Sheets-Sheet I.

m: NORRIS PETERS co. PHOTD-LIYHO.. WASNINGTON D. c.

No. 620,983. Patented Mar. I4, $99..

E E. SLICK.

BLOWING ENGINE.

(Application filed June 1, 1898A (No Model.) 3 Sheets-Sheet 2.

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No. 620,983. Patented Mar. l4, I899.

E. E. 'SLICK.

BLOWING ENGINE.

(Application filed June 1, 1898.-

3 Sheets-Sheet 3.

(No Model.)

INVENTOR 62am; 8. 5220;.

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NITIED STATES PATENT ()FFIGE.

EDWIN E. SLICK, OF BRADDOOK, PENNSYLVANIA.

BLOWING-ENGINE.

SPECIFICATION forming part Of Letters Patent NO. 620,983, dated March 14, 1899.

Application filed June 1, 1898. Serial N0. '682,252| (No model.)

.To all whom it may concern:

Be it known that I, EDWIN E. SLICK, of Braddock, in the county of Allegheny and State of Pennsylvania, have invented a new and usefullmprovement in Blowing-Engines, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which Figure 1 is a Vertical section of a blowingengine cylinder constructed in accordance with my invention. Fig. 2 is a side elevation of the same; and Figs. 3, 4, 5, and 6 are partial sections showing the successive positions of the valves, the piston, and the cylinder.

My invention relates to pneumatic cylinders employed as blowing-engines, air-compressors, refrigerating apparatus, 850., and is designed to provide an improved valve arrangement wherein the disadvantages incident to prior types of valves are largely done away with.

To that end it consists in a cylinder having valved heads and containing a piston in combination with means for moving the cylinder over the piston and heads. It also consists in the construction and arrangement of the parts, as hereinafter more fully described, and set forth in the claims.

In the drawings, 2 represents a blowingcylinder having therein the piston 3, whose piston-rod 4 is actuated from any suitable motive cylinder. The heads of this cylinder are each formed with two valve-chambers 5 5, containing reoiprocatory piston-valves 6, and each valve-chamber surrounded by an annular chamber 7, which communicates with the common outlet-pipe 8. The inner portions of the valve-chambers are reduced somewhat in diameter and are provided with annular series of ports 9, leading to the annular chambers '7, while the outer enlarged bores of these chambers communicate with the annular chambers by small holes 10. The stems 11 of the piston-valves in each head are connected to levers 12, secured to a shaft 13, which is rocked by means of a cam-lever 14, actuated by cam 15. The cam-shaft is connected by levers 16 to a common rod 17 and actuated by a suitable cam or eccentric connection.

The cylinder is provided near each end with an annular series of ports 18 and is moved endwise by links 19, pivotally connected to rocking levers 20, actuated by any suitable connections. The heads of the cylinders are providedwith suitable packings 21, which contact with the cylinder as it is reciprocated over the heads, and the piston-valves are likewise provided with packing-rings 22. The cylinder-heads are connected and supported by oppositely-located distance-pieces 23.

In operating the cylinder, starting with the parts in extreme position at one end, as shown in Fig. 3, at the beginning of the next stroke the piston moves downwardly within the cylinder and the cylinder is at the same time moved downwardly over its heads, Fig. 4 showing the next position of the parts, the bottom valves 6 being governed by the pressure*open when the pressure in the cylinder 2 is equal to the pressure in the annular chambers 7. The parts thereupon assume the position shown in Fig. 5, the piston-valves in the lower head being open and the air being forced therethrough into the outlet, the piston still moving downwardly, while the cyl inder has reached the limit of its downward moven1ent,and then begins to move upwardly. The piston still continues in its downward movement, as shown in Fig. 6, and the pistonvalves in the lower head arethen beginning to close-and are entirely closed when the piston reaches the end of its stroke, slightly cushioning the piston at the end of its travel. The piston then begins to move upwardly, passing through a series of positions the reverse of those shown in Figs. 3 to 6. The piston-valves are given a quick opening movement by the pressure in the cylinder and are closed by the cams shown, and when opened the holes in their rear leading, to the surrounding chambers prevent compression of the air in the valve-chamber which would otherwise occur, these holes equalizing the pressure in the rear of the piston-valves in the various positions thereof.

The advantages of my invention result from the reciprocation of the cylinder itself, which thus acts in the nature of a slide-valve to open and close its slotted ports in connection with the proper movements of the pistonvalves.

Many changes may be made in the form and arrangement of the cylinder and its valves Without departing from my invention, since 1. The combination with a cylinder containing a piston, said cylinder having valved heads and being provided with ports near its ends, of means for reciprocating the cylinder over the heads; substantially as described.

2. A cylinder having heads provided with piston-valves Whose ports communicate with an outlet, said cylinder having ports near its ends, and actuating connections arranged to reciprocate the cylinder over the heads; substantially as described.

3. A cylinder containing a reciprocating piston and having heads provided with piston-valves Whose chambers are connected to an outlet, said cylinder'having an annular series of inlet-ports near each end, and actuating connections arranged to reciprocate the cylinder over the heads; substantially as described.

4. In a blowing-engine, a reciprocatory cylinder having ports near its ends, a reciprocatory piston therein, and reciprocating piston-valves in the cylinder-heads controlling tively stationary heads provided with valves,

of an inlet-valve for the cylinder, means for reciprocating the cylinder over the heads, and for reciprocating the piston, and means for actuating the valves; substantially as described.

In testimony whereof I have hereunto set my hand.

EDWIN E. SLICK.

lVitnesses:

E. E. GREGG, E. H. I-IUTZEN. 

